0){ $scan_request = new scan_request($num_request); switch($sub){ case 'upload': $scan_request->add_explnum(); break; case 'edit': print $scan_request->get_ajax_form(); break; case 'save': print $scan_request->save_ajax_form(); break; case 'del_explnum' : print encoding_normalize::json_encode($scan_request->del_explnum($explnum_id)); break; default: break; } }